Take a look at attached images and you will see the difference.

If you are saying you want it to look like the image on the right add a white background to the center column in ATO>Style and configure center column.

Thank you, above line is still black but if you don't know how to fix that forget...

Now next problem. Where you see black color background in first picture I want to fill it with image but it fills whole background in my site. How to fix this?

In that case you would add a background image to the center column instead of using a color.